Source MS 2750/538/1/1
Source MS 2750/538/1/2
Source MS 2750/538/3/1
Source MS 2750/538/3/2
Source MS 2750/538/3/3
Letter from the Hogarth Press to the Office of the Superintendent, Broadcasting Station (19/05/1939)
Source MS 2750/538/3/4
Letter from the Office of the Superintendent, Broadcasting Station to the Hogarth Press (26/05/1939)
Source MS 2750/538/3/5
Source MS 2750/538/3/6